Home / 299,138-645,238

Finding the Third Proportional to 299,138 and 645,238

Calculator

Solution

The third proportional to 299,138 and 645,238 is: 1,391,772.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,138 : 645,238 = 645,238 : x
  2. Step 2: Convert to fraction form
    299,138/645,238 = 645,238/x
  3. Step 3: Cross multiply
    299,138x = 645,238 × 645,238
  4. Step 4: Simplify right side
    299,138x = 416,332,076,644
  5. Step 5: Solve for x
    x = 416,332,076,644/299,138
  6. Step 6: Final answer
    x = 1,391,772.62

Related Problems

Find third proportional to 149,569 and 322,619
Half scale
Find third proportional to 598,276 and 1,290,476
Double scale
Find third proportional to 299,140 and 645,242
Similar ratio
Find third proportional to 448,707 and 967,857
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.